(Hey there. Are you watching the new HBO show, “Girls”? We are, too! And during last week’s episode, we saw Hannah take her sexual health questions to Google. Here’s what Hannah would have learned if she had googled Planned Parenthood instead. Want to talk about this? Check out our Facebook page for teens.)

The chances of getting an STD from unprotected sex that only lasts for one second are really low … but it may be possible. Certain infections are passed by skin-to-skin contact. We always warn people that brief contact is all that’s needed — but one second is really VERY brief! The risk of getting an infection would be higher if ejaculation happened or pre-cum or vaginal secretions were passed between partners during that one second of contact.

If you’re worried you might have an STD, the best thing you can do is get yourself tested. Contact your local Planned Parenthood health center to set up an appointment. When you get tested, you’ll be able to talk to a health care provider about exactly what happened — like, for example, if you had sex without a condom for one second — and they can help figure out what tests are right for you.